Historical Weather For 1960 in Mahé Island, Seychelles

Location

This report describes the historical weather record at the Seychelles International Airport (Mahé Island, Seychelles) during 1960. This station has records back to January 1949.

Mahé Island has an uncategorized climate. The area within 25 mi of this station is covered by oceans and seas (100%)

Calendar

Daylight saving time (DST) was not observed at Mahé Island during 1960.

1960 was a leap year and thus has 366 days rather than the normal 365. Leap years occur every fourth year and the extra day is always February 29th. In 1960 February 29th falls on a Monday.

The summer and winter solstices and the spring and fall equinoxes mark the passing of the seasons. They fall on nearly the same day each year, with differences of a day or two depending on the year. In 1960 they occurred on:

Spring Equinox Friday, 23 September 1960.
Summer Solstice Wednesday, 21 December 1960.
Fall Equinox Sunday, 20 March 1960.
Winter Solstice Tuesday, 21 June 1960.

Temperature

The hottest day of 1960 was March 20, with a high temperature of 90°F. For reference, on that day the average high temperature is 87°F and the high temperature exceeds 89°F only one day in ten. The hottest month of 1960 was April with an average daily high temperature of 86°F.

Relative to the average, the hottest day was March 20. The high temperature that day was 90°F, compared to the average of 87°F, a difference of 3°F. In relative terms the warmest month was March, with an average high temperature of 86°F, compared to an typical value of 87°F.

The month of January had the largest fraction of warmer than average days with 26% days with higher than average high temperatures.

Temperature

The daily low (blue) and high (red) temperature during 1960 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile). The bar at the top of the graph is red where both the daily high and low are above average, blue where they are both below average, and white otherwise.

The coldest day of 1960 was October 19, with a low temperature of 70°F. For reference, on that day the average low temperature is 77°F and the low temperature drops below 75°F only one day in ten. The coldest month of 1960 was August with an average daily low temperature of 76°F.

Relative to the average, the coldest day was October 19. The low temperature that day was 70°F, compared to the average of 77°F, a difference of 7°F. In relative terms the coldest month was August, with an average low temperature of 76°F, compared to an typical value of 77°F.

The longest cold spell was from July 28 to August 11, constituting 15 consecutive days with cooler than average low temperatures. The month of April had the largest fraction of cooler than average days with 67% days with lower than average low temperatures.

Hourly Temperature Bands

The full year of hourly temperature reports with the days of the year on the horizontal and the hours of the day on the vertical. The hourly temperature measurement is color coded into meaningful temperature bands: frigid is purple (below 15°F), freezing is blue (15°F to 32°F), cold is dark green (32°F to 50°F), cool is light green (50°F to 65°F), comfortable is yellow (65°F to 75°F), warm is light red (75°F to 85°F), hot is medium red (85°F to 100°F), sweltering is dark red (above 100°F), and missing data is pink.

Clouds

The clearest month of 1960 was May, with 52% of days being more clear than cloudy. The longest spell of clear weather was from June 8 to June 12, constituting 5 consecutive days that were clearer than they were cloudy.

Cloud Coverage

The fraction of time spent in each of the five sky cover categories over the course of 1960 on a daily basis. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data. The bar at the top of the graph is gray if the sky was cloudy or mostly cloudy for more than half the day, blue if it is clear or mostly clear for more than half the day, and blue-gray otherwise.

Hourly Cloud Coverage

The full year of hourly cloud coverage reports with the days of the year on the horizontal and the hours of the day on the vertical. The sky cover is color coded: from most blue to most gray, the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

This station did not reliably report precipitation observations or quantitative liquid-equivalent precipitation measurements during 1960.

Snow

Either snow is exceptionally rare at this location or this station did not reliably report it during 1960.

Humidity

Humidity is an important factor in determining how weather conditions feel to a person experiencing them. Hot and humid days feel even hotter than hot and dry days because the high level of water content in humid air discourages the evaporation of sweat from a person's skin.

When reading the graph below, keep in mind that the hottest part of the day tends to be the least humid, so the daily low (brown) traces are more relevant for understanding daytime comfort than the daily high (blue) traces, which typically occur during the night. Applying that observation, the least humid month of 1960 was November with an average daily low humidity of 68%, and the most humid month was January with an average daily low humidity of 73%.

But it is important to keep in mind that humidity does not tell the whole picture and the dew point is often a better measure of how comfortable a person will find a given set of weather conditions. Please see the next section for continued discussion of this point.

Humidity

The daily low (brown) and high (blue) relative humidity during 1960 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Dew Point

Dew point is the temperature below which water vapor will condense into liquid water. It is therefore also related to the rate of evaporation of liquid water. Since the evaporation of sweat is an important cooling mechanism for the human body, the dew point is an important measurement for understanding how dry, comfortable, or humid a given set of weather conditions will feel.

Generally speaking, dew points below 50°F will feel a bit dry to some people, but comfortable to people accustomed to dry conditions; dew points from 50°F to 68°F are fairly comfortable to most people, and dew points above 68°F are increasingly uncomfortable, becoming oppressive around 77°F.

To take some examples, and basing our categorization on the daily high dew point in 1960, January had no dry days, no comfortable days, and 31 humid days; April had no dry days, no comfortable days, and 30 humid days; July had no dry days, no comfortable days, and 31 humid days; and October had no dry days, no comfortable days, and 31 humid days.

Dew Point

The daily low (blue) and high (red) dew point during 1960 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

The highest sustained wind speed was 39 mph, occurring on December 24; the highest daily mean wind speed was 30 mph (July 2);

The windiest month was July, with an average wind speed of 20 mph. The least windy month was March, with an average wind speed of 7 mph.

Wind Speed

The daily low and high wind speed (light gray area) and the maximum daily wind gust speed (tiny blue dashes).

Visibility

Visibility is the maximum distance at which a given reference object or light can be clearly discerned. In the United States, visibilities that are greater than or equal to 10 miles are typically reported as 10 miles.

The day of 1960 with the lowest average visibility was October 19, with an average visibility of 2.1 mi. The month with the lowest average visibility was August, with an average visibility of 16.2 mi. With an average visibility of 28.6 mi, the month of March had the highest average visibility.

Visibility

The daily average visibility, depicted as gray bars encroaching down from the top of the graph.

Cloud Ceiling

The cloud ceiling is the altitude of the lowest layer of clouds that are at categorized as broken (mostly cloudy) or overcast (cloudy). If no such cloud layer exists then the ceiling is unlimited and no value is reported.

The day of 1960 with the lowest average cloud ceiling was October 19, with an average cloud ceiling of 591'. The month with the lowest average cloud ceiling was October, with an average cloud ceiling of 2051'. The month of September has the highest average cloud ceiling, with an average cloud ceiling of 10704'.

Cloud Ceiling

The daily average cloud ceiling, depicted as gray bars encroaching down from the top of the graph. Missing data or days with insufficient clouds to define a cloud ceiling are shown as white columns.